Antistatic friction device.



J. J. OTOOLE.

ANTISTATIG FRICTION DEVICE.-

APPLIGATION FILED MAR. 4, 1910.

Patented July 4, 1911.

Wx MN Rm 0 & O O m w my M0 enn ar. gro m or NEW YORK, n. Y., assrenon or ens-HALE r srms r.

HARRINGTON, or coRoNA, NEW YORK. I

ANTISTATIC FRICTION DEVICE.

Specification of Letters Patent.

Patented July 4, 1911.

Application filed March 4, 1910. Serial No. 547,269.

To all whomt-may concern:

.Be .itlknown that I, JOHN J. OToonn, a

' citizen of the United States, and a resident f and lithographinghesion of layers 0 of New York, county and State of New York,haveinvented certain new and useful Improvements in Antistatic FrictionDevices,of which the following is a'full, clear, and exact specificatioThis invention relates more particularly to an anti-static frictiondevice adapted to used inconnection with printing or lithographingpresses for extracting the staticelectricity from paper which isgenerated dufringthe process ofprinting thereon.

':-It is well known in the art of printing that the frictional adpaperdue to the presence of static-electricity causes a great waste oftendant or feeder at the press.

appliances on the press,

printed upon the extending across material, consumption-10f time andloss of labor. The charge of electricity in the 'sheet slvaries withweather conditions and varies inaccordance with different classes ofpaper, and while the presence of the electricity prevents paper frombeing handled with facility before being printed upon the electricity ismore pronounced and causes perceptibly stronger" frictional. adhesionafter the sheets are printed on one side thereof. This adhesive tendencyof the paper results in improper delivery of the sheets by thefly-sticks or other delivery the sheets clinging closely one to theother producing olfsets. .upon the unprinted side of the paper andpreventing regular and even jogging or straightening-up of the sheets bythe at- Moreover, corners of the sheets become crumpled and curledthereby preventing the sheets from being fed to an accurate register inprintin the second side of the paper or more particularly causinginaccurate registering when two or more. colors are to be paper. Theprimary object of my invention 1s to provide a' device which willeffectually overcome these objections and which devlce consists mainlyof a numberof metal brushes the width of-the press in th b field ofstatic-electricity created by the sheets of paper: during delivery fromthe printing cylinder, the said metal'brushes bethe edges and naked inbearings 1n ing adapted to attractand transmit the'electrio-fluid to amain wire through which it asses and is discharged to ground provided ina space formed at one or both ends of the main wire and the metal frameof the press.

.A further object of the invention is to provide a suitable casing ofinsulating mate-- rial adapted to carry the main wire and theelectricity absorbing brushes which project upwardly above said casingin outwardly curved flared fan like shapes or in the form of curvedprongs, and to arrange the free end or ends of the main wire so as topro.- vide an efficient ground for the discharged electricity.

My invention, furthermore, has for its object to provide a device of;simple and inexpensive-construction which may be readily applied to andused in/connection with various forms, sizes and shapes of printing orlithographing presses, and to provide efficient means for connectingpress.

A practical embodiment of the invention is represented in theaccompanying drawing forming a part of this specification in whichsimilar characters of reference indicate corresponding parts in all theviews, the said invention being more fully described hereinafter andthen pointed out in the appended claims.

In the drawing Figure 1 is a to plan view of a printing press with myanti-static friction device applied thereto in front of the printingcylinder. Fig. 2 is an enlarged fragmentary side view, partly insection, of

my device, showing one form of fastening the device to a the twistedends of the electricity absorbing brushes thereto. Fig. 8 is a sectiontaken on the line III-III of Fig. 2. Fig. 4 1s a fragmentary sectionalview of another form wire, and Fig. 5 is a section taken on'the line VVof Fig. 4.

The press 10 of any well known construction and adapted for printing or'litho graphing on paper may comprise the customary feed board or table11, the printing cylinder 12 upon the revolving shaft 13which is jourtheframe 14 of the of absorbing brushes showing the manner i of fastenmgthe same to the mam discharge mounted in front of said table press, thepaper guiding rollers 15 rotatably held upon the shaft 16 which issecured, as at 17, to the side. frames Li and the endless tapes 18 ofthe usual draw delivery for delivering the printed sheets of paper.

Upon the top of the press 10 is mounted my anti-static friction device20 adjacent to and in front of the guiding rollers 15, where the fieldof electricity is formed under the sheets of paper delivered by theprinting cylinder 12 over the guiding rollers 15\ after being fed intothe press 10 for printing thereon from the table 11. The device 20 ispreferably of sutlicient length to extend across the entire width of thepress 10 so as to rest upon the top of the side-frames 1 1-, and isrigidly held against displacement to the shaft 16 hearing the rotatablerollers 15 by links or clamps 21 or by any other desired means.

To construct the device 20 so as to be durable, eflicient andconveniently applied to a printing press I provide a casing 22 made ofWood or any other suitable insulating material in the top 22 of whichare arranged a number of openings, as at 23, and through said openingspass the stems 24: of a number of metal brushes These absorbing brushes25 are formed of small flexible strands of wire of copper or any other.metal adapted to attract and conduct electricity, and the said brushesare arranged in a row-like manner along the top 22 of the casing 22.Each of the brushes 25 have an outwardly curved part, as at 27, Fig. 3,and project upwardly and laterally into a flared fan like shape, as at28, so as to embrace the entire field of electricity formed by the paperduring the process of printing. The stems 2a of the brushes are formedpreferably by twisting the flexible strands of said. brushes, as shownin Figs. 2 and 3, and providing loops, as at 29, at the lower endsthereof for reception of the main transmitting or discharge wire or rod30 of aluminum, copper or any other suitable conductor of electricity. Achannel or groove 31 and an opening are provided lengthwise of theunderside of the casing 22, and in said channel rests the transmit tingwireiSO which is held against displacement by soldering or otherwiseconnecting a the loops 29 thereto. These parts are inclosed within thecasing 22 by a covering 33 of' insulating material fitting snugly in theopening 32 and forming a closure 3-1.

At the ends of the casing. 20 openings 35 are provided and through saidopenings extend the ends 36 of the main discharge wire 30. The ends 36are insulated, as at 37, and curved, as at 38, so as to extenddownwardly alongside of the frames 14 when the device is in use on topof the press 10. The extreme outer ends of the main transmitting wire 30is freed of the insulating cover 37 and. forms in the spaces l0 betweensaid ends 39 and the frames ll of the press grounds for discharging theelectricity absorbed by the ln'ushcs from the printed paper. \Vhile Ihave set forth my device as having two free ends of the main wire forforming the said grounds, it will be understood, that one free end ofthe main wire may be dispensed with and instead thereof I may close thecasing at said end and employ at this end suitable means for connectingmy device to the press.

Fig. 4 shows the electricity absorbing brushes in the form of prongs orforks, as at -l-1, arranged in a row lengthwise on top of the casing 22.The forked brushes 41 are curved, as at 42, so as to extend outwardlyand upwardly, and are secured with their;lower twisted ends to the maindischarge wire 30 in the same manner as above described with respect tothe form as shown in Fig. 2.

' It is clear that changes may be made in the formof the brushes or inthe proportions and forms of the parts forming my improved anti-staticfriction device and in the manner and place of fastening the same to apress without departing from the scope and purpose of my invention,therefore I do not Wish to be limited to the particular form of thedevice herein described and illustrated.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In a device of the class described, the combination of an insulatingcasing being formed with a groove in one side thereof and havingopenings communicating with said groove and the front face of theinsulating casing, a main discharge wire located within said groove,brush members being wrapped around and soldered to said main dischargewire and having twisted portions passing through said openings andterminating on the face side of said insulating casing in upwardlycurved projecting ing a groove formed in the rear face thereof andhaving openings communicating wi th 1;

said groove and the front face of said-casing, a main discharge wirelocated within said groove, prong-ed metal brushes attached to said maindischarge wire land being adapted to pass through said openings in suchmanner as to form brush membersprojccting from the front'facing of saidinsuems-'5 a lating casing, insulating material being tact with sheetsof paper,- and an end of said adapted-to rest, upon said ina'indischarge main -discharge Wire terminating in close wire andsubstantially close said groove, a proximity with the metallic frame ofa Portion of said main discharge Wire extendprinting press,substantially as described.

5' ing beyond said insulating casing, said eX- This specification signedand witnessed 15 s tending portion of said main discharge Wire thisfirst day of March A. D. 1910.

being curved and covered with insulating JOHN J. OTOOLE. material, andmeans for mounting said de- Witnesses: vice upon a printing press insuch manner Ennninn J. KRUG, J12,

i0 that said metallic prongs are adapted to con- G" WHYARD.

